Exercise apparatus



FIG. 1 is a front perspective view of my new, original and ornamental design for a exercise apparatus;

FIG. 2 is a bottom rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a right side view thereof. 

The ornamental design for exercise apparatus, as shown and described. 